Please help me classify this triangle.

Find the number of positive three-digit even integers whose digits are among 9, 8, 7,5, 3, and 1.

From the top of a tree a bird looks down on a field mouse at an angle of depression of 50°. if the field mouse is 40 meters from the base of the tree, find the vertical distance from the ground to the bird's eyes.

Identify the parent function that can be used to graph the function f(x)=3(x-9)2